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github.com/broofa/node-uuid
Simple, fast generation of RFC4122 UUIDS.
Features:
npm install uuid
const uuid = require('uuid');
// Generate a v4 (random) id
uuid() // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
// Generate a v1 (time-based) id
uuid.v1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
** Not recommende for production or even semi-production use. Use a bundling tool instead (i.e. webpack, browserify, rollup, etc)**
wzrd.in will serve up any npm module after performing basic bundling and minification.
<script src="https://wzrd.in/standalone/uuid@latest"></script>
Generate a V4 uuid. See uuid.v4 documentation below.
options
[, buffer
[, offset
]]])Generate and return a RFC4122 v1 (timestamp-based) UUID.
options
- (Object) Optional uuid state to apply. Properties may include:
node
- (Array) Node id as Array of 6 bytes (per 4.1.6). Default: Randomly generated ID. See note 1.clockseq
- (Number between 0 - 0x3fff) RFC clock sequence. Default: An internally maintained clockseq is used.msecs
- (Number | Date) Time in milliseconds since unix Epoch. Default: The current time is used.nsecs
- (Number between 0-9999) additional time, in 100-nanosecond units. Ignored if msecs
is unspecified. Default: internal uuid counter is used, as per 4.2.1.2.buffer
- (Array | Buffer) Array or buffer where UUID bytes are to be written.
offset
- (Number) Starting index in buffer
at which to begin writing.
Returns buffer
, if specified, otherwise the string form of the UUID
Notes:
Example: Generate string UUID with fully-specified options
uuid.v1({
node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
clockseq: 0x1234,
msecs: new Date('2011-11-01').getTime(),
nsecs: 5678
}); // -> "710b962e-041c-11e1-9234-0123456789ab"
Example: In-place generation of two binary IDs
// Generate two ids in an array
const arr = new Array(32); // -> []
uuid.v1(null, arr, 0); // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
uuid.v1(null, arr, 16); // -> [02 a2 ce 90 14 32 11 e1 85 58 0b 48 8e 4f c1 15 02 a3 1c b0 14 32 11 e1 85 58 0b 48 8e 4f c1 15]
// Optionally use uuid.unparse() to get stringify the ids
uuid.unparse(buffer); // -> '02a2ce90-1432-11e1-8558-0b488e4fc115'
uuid.unparse(buffer, 16) // -> '02a31cb0-1432-11e1-8558-0b488e4fc115'
options
[, buffer
[, offset
]]])Generate and return a RFC4122 v4 UUID.
options
- (Object) Optional uuid state to apply. Properties may include:
random
- (Number[16]) Array of 16 numbers (0-255) to use in place of randomly generated valuesrng
- (Function) Random # generator to use. Set to one of the built-in generators - uuid.mathRNG
(all platforms), uuid.nodeRNG
(node.js only), uuid.whatwgRNG
(WebKit only) - or a custom function that returns an array[16] of byte values.buffer
- (Array | Buffer) Array or buffer where UUID bytes are to be written.
offset
- (Number) Starting index in buffer
at which to begin writing.
Returns buffer
, if specified, otherwise the string form of the UUID
Example: Generate string UUID with fully-specified options
uuid.v4({
random: [
0x10, 0x91, 0x56, 0xbe, 0xc4, 0xfb, 0xc1, 0xea,
0x71, 0xb4, 0xef, 0xe1, 0x67, 0x1c, 0x58, 0x36
]
});
// -> "109156be-c4fb-41ea-b1b4-efe1671c5836"
Example: Generate two IDs in a single buffer
const buffer = new Array(32); // (or 'new Buffer' in node.js)
uuid.v4(null, buffer, 0);
uuid.v4(null, buffer, 16);
npm test
The code for the legacy node-uuid package is available in the node-uuid
branch.
FAQs
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